DESIGN OF ACTIVE FILTER FOR POWER SYSTEM DISTRIBUTION

Abstract

The development of different industries cause a verity of problems for the distribution power systems. One of these problems is the non-linear effects on the loads that take non-periodic and/or non-sinusoidal currents, such as the semiconductor devices, electrical furnaces, induction furnaces, welding devices etc. These effects can overload the system as well as reduction of the system performance and efficiency. Also, increase power quality disturbances tend to lead to various optimizations techniques and filter designs. Harmonic distortions are the major cause for power quality problems. The research presented in this thesis tackles the sources of harmonics distortion and the propagation of the harmonics in the power system. Effects on the power system are also highlighted such as additional losses, harmonic resonance and electromagnetic interference with equipment…etc. Also a detailed analysis of harmonics is presented. This project also takes a closer looks at harmonics reduction methods in power systems. In depth analysis is performed and mathematical model and software simulation for shunt active harmonic filter is developed to design inexpensive solution to eliminate the effect of harmonic. This design is based on the (MATLAB/SIMULATION) package. Active filters are more efficient in eliminating harmonics distortions and improving the power quality and as thus allow pure sinusoidal wave.